Sherrock started hot in good shape in the first round, however, four failed darts on two legs loaded it expensively while Smith took five legs directly, adding a 109 to make the exciting decision.
“I feel like I’ve lost this game, but I’m still here,” Smith told the PDC’s official website.
“To be honest, I’m the most productive player of the moment. “
Steve Beaton beat Simon Whitlock in the last thriller, while Glen Durrant fought for a comfortable 6-3 win over Dimitri Van Den Bergh.
Joe Cullen defeated 6-0 through Vincent Van Der Voort, Dave Chisnall lost 6-2 to Cody Harris, Ian White lost 6-5 to Damon Heta and Harry Ward lost 6-2 to Darius Labanauskas.